Complete educational visual material "Collection of minerals" (part 3) for high school and college students and teachers. Cardboard box, plastic trays for mineral samples. Each piece has a glued number according to the "Content" with names printed on the back side of a box cover. 10 specimen. Russian language.ContentRaw materials for various industries
23. quartz
24. feldspar
25. mica
(muscovite)
26. chalk
27. a***s
28. fluorspar
/ fluorite
29. kaoline
30. graphite
31. corundum
32. perlite
DATE:1980, USSRWe have more items of this kind not listed yet, message us if you are interested.